/A option is added to use the display as it is, i.e. withoutre-initialization of display controller when DMV is activated.PRT SC key problem is fixed. This key works as DMV screen print, only ifDMV is active.

Version 1.00 ( Initial release )

DMV is a special debugging tool for programmers, especially for ASSEMBLE,that allows them to view contents of any memory address at any timewithout halting PC execution.DMV, once called, remains resident and occupies about 8k storage.DMV traps keyboard interrupt ( INT 9 ) to check key for DMV, and trapstimer tick ( INT 1C ) to refresh the screen.While refreshing the screen, DMV ignores NMI ( non-maskable interrupt )which might occur if non-installed memory is to be displayed.

On the screen, there are 10 memory addresses assigned as function keys,which can be used to load/store any memory address desired.

DMV contains an online help screen that describes how it is used.

DMV supports both black/white and color/graphic displays. If both areinstalled, one can be used to view memory contents while the other isused by any other program.

Because of the hardware limitation of color/graphic display, DMV on PCdisables video signal while refreshing the screen. This takes about 30msor PC/XT. If the screen is refreshed with every timer tick,a noticeableflickering will occur with every refresh. It is thus recommended to useincreased refresh cycle time, or to use a mono display for DMV.